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As omnivorous birds, ducks will eat many different foods, and the best foods to offer ducks include: 1  Cracked corn. 2  Wheat, barley or similar grains. 3  Oats (uncooked; rolled or quick) 4  Rice (cooked or uncooked) 5  Milo seed. 6  Birdseed (any type or mix) 7  Grapes (cut in half or quartered if very large)
Mallard ducks are omnivores, so they have a lot of plants and animals to choose from when it is time to eat. Some of the vegetarian entrees for Mallards are water elm seeds, oak seeds and hackberry seeds.Mallard ducks also eat wild rice, corn, wheat and barley. Other plants in a Mallard's diet include bulrushes, primrose and willow. Insects such as beetles, flies and dragonflies are tasty treats for Mallard ducks.Mallards also eat mollusks, small fish and fish eggs.On the water's surface, Mallard ducks also feast on frogs, tadpoles, worms and snails. These types of foods provide the protein and fat nutrients a Mallard duck needs in its diet.ther plants in a Mallard's diet include bulrushes, primrose and willow. Insects such as beetles, flies and dragonflies are tasty treats for Mallard ducks. Mallards also eat mollusks, small fish and fish eggs.